CN114198435B

CN114198435B - Rotary swing arm type braking device

Info

Publication number: CN114198435B
Application number: CN202010988044.5A
Authority: CN
Inventors: 林锦桐
Original assignee: Guangdong Power Grid Co Ltd; Jiangmen Power Supply Bureau of Guangdong Power Grid Co Ltd
Current assignee: Guangdong Power Grid Co Ltd; Jiangmen Power Supply Bureau of Guangdong Power Grid Co Ltd
Priority date: 2020-09-18
Filing date: 2020-09-18
Publication date: 2023-08-29
Anticipated expiration: 2040-09-18
Also published as: CN114198435A

Abstract

The application relates to the technical field of brakes, in particular to a rotary swing arm type braking device. The device comprises a wheel body and at least two brake shoes, wherein the brake shoes are arranged around the circumference of the wheel body, the end parts of the brake shoes are provided with elastic linkage parts, the end parts of every two brake shoes are elastically connected, and the whole brake shoes are of an annular structure; the wheel body is hinged with a plurality of swing arms, and each swing arm is uniformly distributed around the circumferential direction of the wheel body; one end of the swing arm is hinged with the wheel body, and the other end of the swing arm swings back and forth to penetrate through the maximum outer diameter of the wheel body. The wheel body rotates, the swing arm swings under the action of centrifugal force, and then the brake shoes are jacked up and are spread in pairs, so that the annular outer diameter of the brake shoes is increased, braking is carried out, and the swing direction of the swing arm is opposite to the rotation direction of the wheel body. According to the application, the centrifugal force in rotation is utilized to swing and eject the swing arm in high-speed rotation, and braking is timely implemented, so that the speed reduction and speed limiting effects are achieved, and the safety is better improved.

Description

Rotary swing arm type braking device

Technical Field

The application relates to the technical field of brakes, in particular to a rotary swing arm type braking device.

Background

A brake is a device having a function of decelerating, stopping, or maintaining a stopped state of a moving part (or a moving machine), and is a mechanical component for stopping or decelerating a moving part in the machine. In the field of automobiles and other safety devices, the use of brakes is quite common, and currently, the types of brakes on the market are various, and the types adopted in different use scenes are not more.

Chinese patent publication No. CN107830082a discloses a simple balance brake in 2018, 03 and 23, which is a brake for vehicles, and uses the rotation form of a cam to push a brake shoe to brake. However, this brake mainly performs active braking, and requires manual operation to perform braking.

Disclosure of Invention

The application aims to overcome the defects in the prior art, and provides the rotary swing arm type braking device which utilizes the centrifugal force effect in rotation to swing and eject the swing arm in high-speed rotation to timely implement braking, thereby achieving the effect of speed reduction and speed limitation and better improving the safety.

In order to solve the technical problems, the application adopts the following technical scheme:

the rotary swing arm type braking device comprises a wheel body and at least two braking shoes, wherein the braking shoes are arranged around the circumference of the wheel body, the end parts of the braking shoes are provided with elastic linkage parts, the end parts of every two braking shoes are elastically connected, and the whole braking shoes are of an annular structure; the wheel body is hinged with a plurality of swing arms, and each swing arm is uniformly distributed around the circumferential direction of the wheel body; one end of the swing arm is hinged with the wheel body, and the other end of the swing arm swings back and forth to penetrate through the maximum outer diameter of the wheel body.

The elastic linkage part is divided into a first linkage part and a second linkage part, the first linkage part is provided with a positioning column, the second linkage part is provided with a limit groove arranged along an arc line, the limit groove is matched with the positioning column, and the positioning column slides back and forth in the limit groove; an elastic piece is arranged in the limiting groove, the elastic piece is abutted against the positioning column along the sliding direction of the positioning column, and the elastic piece is always kept in a compressed state; the ends of the two matched brake shoes are respectively provided with a first linkage part and a second linkage part. The first linkage part and the second linkage part are assembled to realize elastic linkage. It should be noted that, the end portion of the brake shoe is only provided with the first linkage portion or the second linkage portion, and the elastic linkage portion of the two brake shoes matched with one end cannot be the same linkage portion, or cannot be assembled. When the brake shoe is propped open, the positioning column of the first linkage part extrudes the elastic part, overcomes the elastic force of the elastic part and slides along the limit groove of the second linkage part. Conversely, the positioning column returns under the elasticity of the elastic piece, and the brake shoe completes the return.

The wheel body rotates, the swing arms swing under the action of centrifugal force, and then each brake shoe is jacked up and spread in pairs, so that the annular outer diameter of the brake shoes is increased, and braking is carried out; wherein the swing direction of the swing arm is opposite to the rotation direction of the wheel body. When in use, the wheel body is connected with the external rotating shaft and synchronously rotates. When the wheel body rotates at a high speed, the brake shoes tend to expand outwards under the action of centrifugal force, and meanwhile, the swing arms on the wheel body swing against the rotation direction of the wheel body under the action of centrifugal force, so that the brake shoes are pushed and spread to brake. When the rotation speed is reduced, the centrifugal force effect is reduced, the brake shoe is elastically restored, and the braking effect is reduced.

As one preferable scheme, the brake device further comprises two side outer covers, wherein the outer covers cover the two axial sides of the wheel body and clamp each brake shoe; the outer cover is fixedly clamped with the wheel body. The outer cover covers the two sides of the wheel body and the brake shoe, so that the radial movement of the top block and the brake shoe is not influenced.

As one preferable scheme, the swing arms are arranged in a central symmetry way, and the center of symmetry is the center of the wheel body. The swing arms are uniformly and symmetrically arranged, and are swung and ejected to the inner wall of the brake shoe under the action of centrifugal force, so that the brake shoe is propped up.

As one preferable scheme, the swing arm is of a strip-shaped structure, a top block is integrally arranged at one swing end of the swing arm, and the weight of the top block is larger than that of one hinged end of the swing arm. The swing arm is designed into a strip-shaped structure suitable for swinging, wherein the weight of a top block at the swinging end accounts for more than half of the total weight of the swing arm, and the swinging trend is more obvious under the action of centrifugal force.

As one preferable scheme, the wheel body is provided with a swinging cavity for swinging the swinging arm freely, and one side of the swinging cavity intersecting with the outer diameter of the wheel body is hollowed; the number of the swing cavities corresponds to that of the swing arms one by one, and the swing cavities are mutually independent; the swing cavity is fixed with a fixed shaft for hinging the swing arm. The swing cavity provides a space for the swing arm to swing, and meanwhile, the swing range of the swing arm is restrained. The swing cavity is of an open structure, and one side of the swing cavity, which is intersected with the outer diameter of the wheel body, is hollowed out so that the swing arm swings out.

As one preferable scheme, the top block is of a cylindrical structure or a spherical structure. The outer edge of the ejector block is generally an arc surface, so that friction force in the ejection process is reduced conveniently.

As one preferable scheme, the circumferential outer wall of the brake shoe is provided with a friction plate. The friction plate is a common component of the existing brake and is mainly used for enhancing the braking effect and the wear resistance of the brake shoe.

As one preferable scheme, the centers of the wheel body and the outer cover are respectively provided with a shaft hole. The shaft hole is mainly used for synchronously connecting the wheel body, the outer cover and the external rotating shaft.

As one preferable scheme, the elastic piece is a spring or a rubber block. The elastic member is a member having elastic restoring ability, and is preferably a spring.

Compared with the prior art, the application has the beneficial effects that: the application discloses a rotary swing arm type braking device which can be used as self-starting braking equipment, when the rotary acceleration is too fast, the generated centrifugal force is increased, a swing arm swings against the rotation direction of a wheel body, and a brake shoe is automatically ejected and opened to brake, so that the effect of decelerating or limiting speed is achieved in time, and human errors are reduced.

Drawings

Fig. 1 is a schematic structural diagram of embodiment 1.

Fig. 2 is an overall view of example 1.

Fig. 3 is a schematic view of the use state of embodiment 1.

Fig. 4 is a schematic diagram showing a braking state structure of embodiment 1.

Fig. 5 is an internal structural diagram of embodiment 1.

Fig. 6 is a schematic view of a first configuration of the elastic linkage.

Fig. 7 is a schematic view of a second construction of the elastic linkage.

Fig. 8 is an assembled state diagram of the elastic linking portion.

Fig. 9 is a schematic diagram of an assembled brake shoe of example 2.

The device comprises a wheel body 1, a swinging cavity 11, a fixed shaft 12, a brake shoe 2, an outer cover 3, a friction plate 4, an elastic linkage part 5, a first linkage part 51, a second linkage part 52, a positioning column 53, a limiting groove 54, an elastic piece 55, a swinging arm 6 and a top block 61.

Detailed Description

The drawings are for illustrative purposes only and are not to be construed as limiting the present patent; for the purpose of better illustrating the embodiments, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the actual product dimensions; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationship depicted in the drawings is for illustrative purposes only and is not to be construed as limiting the present patent.

Example 1

As shown in fig. 1, the application provides a rotary swing arm type braking device, which comprises a wheel body 1, two brake shoes 2 and two outer covers 3, wherein the two brake shoes 2 are semicircular, the two brake shoes 2 are arranged around the circumferential direction of the wheel body 1 to form an annular structure, the end parts of the two brake shoes 2 are provided with elastic linkage parts 5, and the two brake shoes 2 are elastically connected through the elastic linkage parts 5. Meanwhile, friction plates 4 are arranged on the circumferential outer wall of the brake shoe 2.

Specifically, the elastic linkage part 5 is divided into a first linkage part 51 and a second linkage part 52, wherein the first linkage part 51 is provided with a positioning column 53, the second linkage part 52 is provided with a limiting groove 54 arranged along an arc, the limiting groove 54 is matched with the positioning column 53, and the positioning column 53 slides back and forth in the limiting groove 54. In addition, an elastic member 55 is disposed in the limiting groove 54, the elastic member 55 abuts against the positioning post 53 along the sliding direction of the positioning post 53, and the elastic member 55 is always kept in a compressed state, in this embodiment, the elastic member 55 is a rubber block.

Note that, only the first coupling portion 51 or the second coupling portion 52 is provided at the end of the brake shoe 2, and the first coupling portion 51 and the second coupling portion 52 are provided at the end of the two brake shoes 2 that are engaged with each other, respectively, as shown in fig. 8.

The specific matching shapes of the first and second interlocking parts 51 and 52 can take various forms, so the present application is not limited to the specific one, and two common structures are shown in fig. 6 and 7.

In this embodiment, as shown in fig. 5, six swing arms 6 are hinged on the wheel body 1, each swing arm 6 is uniformly distributed around the circumferential direction of the wheel body 1, and is centrally and symmetrically arranged, and the center of symmetry is the center of the wheel body 1. Specifically, the wheel body 1 is provided with a swing cavity 11 for the swing arm 6 to swing freely, a fixed shaft 12 for hinging the swing arm 6 is fixed in the swing cavity 11, and one side of the swing cavity 11 intersecting with the outer diameter of the wheel body 1 is hollowed out so that the swing arm 6 swings out. Moreover, the number of the swing cavities 11 corresponds to that of the swing arms 6 one by one, the swing cavities 11 are mutually independent, the space for the swing arms 6 to swing is provided, and meanwhile the swing range of the swing arms 6 is restrained, so that the swing arms 6 swing to pass through the maximum outer diameter of the wheel body 1 under the action of centrifugal force.

In this embodiment, the swing arm 6 has a bar-shaped structure, one end of the swing arm 6 is hinged to the fixed shaft 12, one end of the swing arm is provided with a top block 61 having a cylindrical structure, the weight of the top block 61 is greater than that of the hinged end of the swing arm 6, specifically, the weight of the top block 61 occupies more than half of the total weight of the swing arm 6, and the swing trend is more obvious under the action of centrifugal force.

In this embodiment, under the condition that the wheel body 1 rotates clockwise in an acceleration manner, the swing arm 6 on the wheel body 1 swings counterclockwise under the action of centrifugal force, so that the brake shoes 2 are pushed to be spread, the brake shoes 2 are braked, and then the brake shoes are automatically folded and reset under elasticity, so that the brake or the deceleration can be automatically implemented under emergency conditions, the additional manual control is not needed, and the control effect is better, as shown in fig. 3-4. In other conditions, the rotation angle of the swing arm 6 can be changed by changing the position of the fixed shaft 12, adapting to a clockwise braking or a counter-clockwise braking, such structural adjustment being foreseen in the art and therefore not described in detail in this implementation.

Specifically, as shown in fig. 2, the outer covers 3 on both sides cover both sides of the wheel body 1 in the axial direction, and clamp each brake shoe 2, and in this embodiment, the outer covers 3 cover both sides of the wheel body 1 and the brake shoes 2. Simultaneously, enclosing cover 3 and wheel body 1 joint are fixed, and wheel body 1, the center of enclosing cover 3 all leaves the shaft hole, and the shaft hole mainly used wheel body 1, enclosing cover 3 are connected with outside pivot synchronization.

The specific process is as follows: when the rotational acceleration of the wheel body 1 reaches a certain value, the generated centrifugal force also reaches the trigger point of the braking device, and the brake shoe 2 tends to expand outwards under the action of the centrifugal force. At this time, the swing arms 6 on the wheel body 1 swing against the rotation direction of the wheel body 1 under the action of centrifugal force, and the ejector blocks 61 on the swing arms 6 push each brake shoe 2 and prop the brake shoes 2 apart from each other, so that the annular outer diameter of the brake shoes 2 is increased, and the speed is reduced and braked.

When the brake shoe 2 is spread, the positioning post 53 of the first linkage part 51 presses the elastic member 55, overcomes the elastic force of the elastic member 55, and slides along the limiting groove 54 of the second linkage part 52. When the rotation acceleration of the wheel body 1 is reduced, the centrifugal force of the swing arm 6 is reduced, the brake shoes 2 slide along the limiting grooves 54 to return under the elasticity of the elastic pieces 55, and the brake shoes 2 are folded and reset.

Example 2

The present embodiment also provides a rotary swing arm 6 type braking device, and the braking principle and structure are similar to those of embodiment 1, and the difference is that the number of the brake shoes 2 in this embodiment is more than two, and the end parts of each brake shoe 2 are connected end to end through the elastic linkage part 5 to form an annular structure, as shown in fig. 9, when braking, each brake shoe 2 is pushed by the swing arm 6 and simultaneously is outwards spread to brake.

It is to be understood that the above examples of the present application are provided by way of illustration only and not by way of limitation of the embodiments of the present application. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the application are desired to be protected by the following claims.

Claims

1. A rotary swing arm type braking device, characterized in that: the wheel comprises a wheel body and at least two brake shoes, wherein the brake shoes are arranged around the circumference of the wheel body, the end parts of the brake shoes are provided with elastic linkage parts, the end parts of every two brake shoes are elastically connected, and the whole wheel body is of an annular structure; the wheel body is hinged with a plurality of swing arms, and each swing arm is uniformly distributed around the circumferential direction of the wheel body; one end of the swing arm is hinged with the wheel body, and the other end of the swing arm swings back and forth to penetrate through the maximum outer diameter of the wheel body;

the elastic linkage part is divided into a first linkage part and a second linkage part, the first linkage part is provided with a positioning column, the second linkage part is provided with a limit groove arranged along an arc line, the limit groove is matched with the positioning column, and the positioning column slides back and forth in the limit groove; an elastic piece is arranged in the limiting groove, the elastic piece is abutted against the positioning column along the sliding direction of the positioning column, and the elastic piece is always kept in a compressed state; the ends of the two matched brake shoes are respectively provided with a first linkage part and a second linkage part;

the wheel body rotates, the swing arms swing under the action of centrifugal force, and then each brake shoe is jacked up and spread in pairs, so that the annular outer diameter of the brake shoes is increased, and braking is carried out;

the swing direction of the swing arm is opposite to the rotation direction of the wheel body.

2. The rotary swing arm brake according to claim 1, wherein: the brake shoe is characterized by further comprising two outer covers, wherein the outer covers cover the two axial sides of the wheel body and clamp each brake shoe; the outer cover is fixedly clamped with the wheel body.

3. The rotary swing arm brake according to claim 2, wherein: the swing arms are arranged in a central symmetry mode, and the center of symmetry is the center of the wheel body.

4. A rotary swing arm brake according to claim 2 or 3, wherein: the swing arm is bar-shaped structure, and the swing one end of swing arm is equipped with the kicking block, kicking block weight is greater than the weight of the articulated one end of swing arm.

5. The rotary swing arm type brake according to claim 4, wherein: the wheel body is provided with a swing cavity for the swing arm to swing freely, and one side of the swing cavity intersecting with the outer diameter of the wheel body is hollowed; the number of the swing cavities corresponds to that of the swing arms one by one, and the swing cavities are mutually independent; the swing cavity is fixed with a fixed shaft for hinging the swing arm.

6. The rotary swing arm type brake according to claim 4, wherein: the top block is of a cylindrical structure or a spherical structure.

7. The rotary swing arm brake according to claim 1, wherein: friction plates are arranged on the circumferential outer wall of the brake shoe.

8. The rotary swing arm type brake according to claim 5, wherein: the centers of the wheel body and the outer cover are respectively provided with a shaft hole.

9. The rotary swing arm brake according to claim 1, wherein: the elastic piece is a rubber block.

10. The rotary swing arm brake according to claim 1, wherein: the elastic piece is a spring.